I'm working with the Internet Archive's API to search LibriVox on behalf of my users but would like an easier way to link back to LibriVox for each item. I found the LibriVox API does not meet my needs for keyword searching.
Right now the 'identifier' returned by the IA API is not directly 'resolvable' to a given item in the LibriVox catalogue—only the file resource in the archive—so I end up chomping the catalogue link from within the 'description' field where possible.
I noticed that in querying the Project Gutenberg collection, Gutenberg's call numbers are returned properly as 'call_number' in the IA API.
It would be super helpful and consistent if a query within the LibriVox collection returned the project's internal IDs as the call number. Right now nothing is returned for that field, so I sense there would be no collision with other data.
In case you're still interested I keep a database for my own site which has the archive.org identifiers for all LibriVox audiobooks. If you want I can export it and send to you.